Your heart is located in between your lungs in the center of your chest, behind and also slightly come the left of her breastbone (sternum). A double-layered membrane referred to as the pericardium surrounds your heart choose a sac. The outer layer the the pericardium surrounds the roots of her heart"s significant blood vessels and also is fastened by ligaments to your spinal column, diaphragm, and also other components of her body

The heart weighs between 7 and 15 ounces (200 to 425 grams) and also is a small larger than the size of her fist. By the finish of a lengthy life, a person’s heart may have actually beat (expanded and contracted) more than 3.5 exchange rate times. In fact, each day, the average heart to win 100,000 times, pumping about 2,000 gallons (7,571 liters) the blood.

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Your love is located between your lung in the center of her chest, behind and slightly come the left of your breastbone (sternum). A double-layered membrane called the pericardium surrounds your heart like a sac. The external layer that the pericardium surrounding the roots of your heart’s significant blood vessels and is fastened by ligaments to your spinal column, diaphragm, and other parts of her body. The inner class of the pericardium is attached to the heart muscle. A coating of fluid separates the 2 layers that membrane, letting the heart relocate as it beats.

Your heart has 4 chambers. The upper chambers are called the left and also right atria, and also the lower chambers are called the left and right ventricles. A wall surface of muscle called the septum separates the left and right atria and also the left and right ventricles. The left ventricle is the largest and strongest room in your heart. The left ventricle’s chamber walls room only around a half-inch thick, but they have sufficient force to push blood v the aortic valve and also into her body.

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The love Valves

Four valves regulate blood flow through your heart:

The tricuspid valve regulates blood flow between the appropriate atrium and right ventricle.The pulmonary valve controls blood flow from the ideal ventricle right into the pulmonary arteries, which bring blood to her lungs to choose up oxygen.The mitral valve lets oxygen-rich blood from your lungs happen from the left atrium into the left ventricle.The aortic valve opens up the method for oxygen-rich blood to happen from the left ventricle right into the aorta, her body’s largest artery.The Conduction System

Electrical impulses from your heart muscle (the myocardium) cause your love to contract. This electric signal starts in the sinoatrial (SA) node, situated at the height of the ideal atrium. The SA node is sometimes called the heart’s “natural pacemaker.” An electric impulse indigenous this herbal pacemaker travels v the muscle yarn of the atria and ventricles, causing them come contract. Return the SA node sends electric impulses in ~ a particular rate, your heart rate may still adjust depending on physics demands, stress, or hormonal factors.

The Circulatory System

The heart and also circulatory system consist of your cardiovascular system. Your heart works as a pump the pushes blood to the organs, tissues, and cells of your body. Blood it is intended oxygen and also nutrients come every cell and also removes the carbon dioxide and waste commodities made through those cells. Blood is carried from her heart to the rest of your body with a complicated network of arteries, arterioles, and capillaries. Blood is went back to your heart v venules and also veins. If every the ship of this network in your body to be laid end-to-end, castle would prolong for around 60,000 miles (more 보다 96,500 kilometers), which is far enough to circle the earth an ext than twice!